Builder&#39;s hardware



Feb. 16, 1943. E. H. JOHNSON 2,311,278

l unamfvs HARDWARE Filed Apri1 14 1941 37 @um Mmmm# Patented Feb. 16,1943 Elvin H. Johnson, Winnetka, lill.

Application April 14, 1941, Serial No. 388,371

9 Claims.

My invention relates to builders hardware and includes among its objectsand advantages the provision of an improved door bumper of the typeconstructed to be attached to the oor, which is both durable andparticularly immune to accidental or mischievous damage.

In the accompanying drawing Figure 1 is a perspective view of a deviceaccording to the invention;

Figure 2 is a section as on line 2 2 of Figure 1;

Figure 3 is a similar section of a modification, and

Figure 4 is a similar section of a second modiflcation.

In the embodiment of the invention selected for illustration in Figuresl and 2, I have indicated a bronze base or floor plate Il) apertured atl2 to receive fastening means lll for fastening it in place on a oor I6or other similar structure. 'Ihe base lil has a cored aperture lprovidedfor convenience in casting and cleaning and a threaded aperture 2li toreceive a positioning and retaining stud 22 described in detailhereinafter.

Above the left half of the base I is provided the dome 2li which issubstantially a portion of a hollow sphere, cut away in a vertical planeat 26 to define a pocket for receiving the rubber bumper 28. Both theouter and inner surfaces of the dome 25 are substantially spherical eX-cept for the boss 3S which provides an increased thickness of metal inline with the aperture 2t, and is counterbored at 32 to receive theupper tip of the reduced upper portion 34 of the stud 22.

To assemble the parts, the casting is placed in a suitable supportingjig and the rubber 28 is pressed home into the position of Figure 2.While the rubber is thus being pressed into place the stud E2 is forcedinto position and threaded home, being provided with a screwdriver slotat 36 to facilitate the assembly. I prefer to design and proportion therubber so that when it is pushed into firm abutment with the dome 2lithe aperture for receiving the stud extension 34 is still a little tothe right of the axis of the stud as shown in Figure 2 so that insertionof stud jams the rubber little between the stud and the dome. Except forthe counterbore 3?.,the inner surface of the dome 2i is left with thefine surface coringaticns resulting from sand casting or a similarcasting process, which further increases the gripping action between therubber 28 and the dome 2li. The combined gripping action resulting fromwedging the rubber into the dome and subsequently binding itadditionally by the stud extension 3i is such that any one experimentingto see how firmly the rubber is fastened in place, either as a matter ofcuriosity or as a matter of mischief, will find it quite impossible toget the rubber out, short of tearing it into small pieces with a screwdriver, chisel, or the like.

The workman installing the device rst drills a hole in the oor toreceive the stud 22 and then places the device in the position shown inFigure t' 2 and drives home the fastening screw I4, with the rubber 28suitably positioned to receive and cushion the impact of the door 31.

In the embodiment illustrated in Figure 3 the finished structureoperates the same as in Figure 2, but the rubber 38 is inserted throughthe bottom, the base being cut away for that purpose. And the dome 40 isprovided with a relatively large upper stud 42 having a smallercontinuation lili adapted to enter the licor or other support. Therubber 38 is held in place by a retaining plate 6, which, in turn, isheld in place by a washer 48 which is a press fit forced home over theextension ll.

In the embodiment of Figure 4 the base 5E! may be identical with thatinFigure 3 but the dome 52 is provided with a short knob or stud 5ft seta little farther forward than the stud 42. The rubber 576 may beinserted through the bottom or the front, and the closure plate 58 is acasting having a short upwardly projecting stud Se and a downwardlyprojecting stud 62. In assembly at the factory and until installation bythe user, the plate 58 may be held in place by a pair of rivets or studsGi bent over under its right hand edge as at 65, or by merely peeningover the adjacent portion of the base.

Without further elaboration, the'foregoing will so fully explain myinvention that others may, by applying knowledge current at the time ofapplication, readily adapt the same for use under various conditions ofservice.

I claim:

1. A door bumper of the type adapted for mounting on a floor,comprising, in combina-V fit snugly in said dome, and a portionprojecting from said first portion past the plane of said opening; astud threaded through a central portion of said bottom and projectingbelow the said bottom and above the said bottom at least to near the topof said cavity; said first cushioning member portion having a bore toreceive said stud; said projecting portion having substantially theshape of a right cylinder; said bore, in the undistorted condition ofsaid member lying farther from the closed end of said cavity than theaxis of said stud, whereby said stud forces said member out of itsundistorted condition and maintains local compression strain and stressin said member, in the space between said stud and the closed end ofsaid cavity; said base plate having an opening in the end remote fromsaid cavity to receive a fastening member for fastening said base plateto a floor.

2. A bumper, comprising, in combination: a base plate; a hollow domeintegral with said base plate and defining a cup-shaped cavity having anapproximately spherical wall adjacent one end of said plate andanopening lying in a plane perpendicular to said plate and facing awayfrom said spherical wall; a resilient one piece rubber cushioning memberhaving a portion shaped to fit snugly in said dome, and a portionprojecting from said first portion past the plane of said opening; vsaidcup-shaped cavity having a rough inner surface; a stud threaded througha central portion of said base plate and projecting into said cavity;said first cushioning member portion having a bore to receive said stud.

'3. A door bumper of the type adapted for mounting on a floor,comprising, in combination: a fiat base plate adapted to lie on theiloor; a hollow vdome integral with said base plate and defining acup-shaped cavity having an approximately spherical upper wall at oneend of said plate, an opening lying in a transverse vertical plane andfacing toward the opposite end of -said plate, and a flat bottom wallconstituted by part of said base plate; a resilient Yrubber cushioningmember having a portion shaped to fit snugly in said dome; vand aportion projecting from said first portion past `the plane of saidopening; a stud passing through a central portion of said bottom andprojecting above the said bottom; said first cushioning member portionhaving va bore to receive said stud; said base plate having an openingin the end remote from said cavity to receive a fastening member forfastening said base plate to a floor, and a stud in the end remote fromsaid opening, adapted to enter a registering hole in the ysupportingVfloor.

4. A door bumper of the type adapted for mounting on a floor,comprising, in combination: a fiat base plate adapted t lie on thefloor; a hollow dome integral with said base plate and vdefining acup-shaped cavity having ran approximately spherical upper wall at oneend of said plate, an opening 'lying in a transverse vertical plane andfacing toward the opposite end of said plate, and a fiat bottom wallconstituted by part of said base plate; a resilient one pieceY rubbercushioning member having a portion shaped to fit snugly in said dome;and a portion projecting from said -iirst portion past the plane of saidopening; a stud located centrally of said bottom and projecting upwardlyabove the said bottom; said first cushioning member portion having :abore to receive said stud; said base plate having an opening inthe endremote from said cavity to receive a fastening member for fastening saidbase plate to a oor, and a downwardly projecting stud in the end remotefrom said opening, adapted to enter a registering hole in the supportingfloor.

5. A door bumper of the type adapted for mounting on a floor,comprising, in combination: a flat base plate adapted to lie on thefloor; a hollow dome integral with said base plate and defining acup-shaped cavity having an approximately spherical upper wall at oneend of said plate, an opening lying in a transverse vertical plane andfacing toward the opposite end of said `plate, and a flat bottom wall; aresilient one piece rubber cushioning member having a portion shaped `tovfit snugly in said dome; and a portion projecting from said firstportion past the plane of said opening; a stud located centrally of saidbottom and projecting upwardly above the said bottom; said firstcushioning-member portion having a bore to receive said stud; said baseplate having an opening in the end remote from said cavity to receive afastening member for fastening said base plate to a floor, and adownwardly projecting stud in the end remote from said opening, adaptedto enter a registering hole in the supporting floor; said bottom wallbeing a separate piece of material riveted to said base plate.

6. A door bumper of the type adapted for mounting on a floor,comprising, in combination: a flat base plate adapted to lie on thefloor; a hollow dome integral with said base plate and dening acup-shaped cavity having an approximately spherical upper wall at oneend of said plate, an opening lying in a transverse vertical plane andfacing toward the opposite end of said plate, and a flat bottom wallconstituted by part of said base plate; a resilient one piece rubbercushioning member having a portion shaped to t snugly in said dome; anda portion projecting from said first portion past the plane of saidopening; a stud located centrally of said bottom and projecting upwardlyabove the said bottom; said -rst cushioning member portion having a boreto receive said stud; said base plate having an opening in the endremote from said cavity to receive a fastening member for fastening saidbase plate to a iioor, and a downwardly projecting stud in the endremote from said opening, adapted to enter a registering hole in thesupporting floor; said studs constituting the aligned upper 'and lowerportions of a single cylindrical'member.

'7. A door 'bumper of the type adapted for mounting on a oor,comprising, in combination: a at base plate adapted to lie on the floor;a hollow dome integral with said base plate and defining a cup-shapedcavity having an approximately spherical wall at one end Yof said plate,an opening lying in a transverse vertical plane and facing toward theopposite end of said plate, and a at bottom wall; a resilient one piecerubber cushioning member having a portion shaped to t snugly in saiddome, and a portion projecting from vsaid first portion past the planeof said opening; a stud projecting down from said dome through `thecenter of said bottom and projecting below the said bottom; said rstcushioning member portion having a bore to receive said stud: said baseplate having an opening in the end remote from said cavity to receive afastening member for fastening said base plate to a floor: said :bottomwall being fastened to said stud to hold said bottom wall in place.

8. A door bumper of the type adapted for mounting on a floor,comprising, in combination:

a flat base plate adapted to lie on the oor; a hollow dome integral withsaid base plate and defining a cup-shaped cavity having an approximatelyspherical upper wall at one end of said plate, an opening lying in atransverse vertical plane and facing toward the opposite end of saidplate, and a flat bottom Wall constituted by part of said base plate; aresilient rubber cushioning member having a portion shaped to fit snuglyin said dome; and a portion projecting from said rst portion past theplane of said opening; a fastening member extending upward from thebottom of said cup-shaped cavity into said cushioning member andretaining said cushioning member in place; and a stud extendingdownwardly from the bottom of said cavity to enter a hole in asupporting structure.

9. A door bumper of the type adapted for mounting on a floor,comprising, in combination:

a at base plate adapted to lie on the floor; a hol- 10W dome integralwith said base plate and dening a cup-shaped cavity having anapproximately spherical upper wall at one end of said plate, an

opening lying in a transverse vertical plane and 1 ELVIN H. JOHNSON.

